In any matter with respect to which such clerk shall have power to act but in which he shall be interested, so that it will be improper for him to act therein, such powers and duties other than such as are judicial in their nature, may be exercised and discharged, in the office of the last-mentioned clerk, by the clerk of the circuit court of the same county, and such powers and duties, so far as the same are judicial in their nature, may be exercised and discharged by any judge of the circuit court of the same county, in the office of the clerk of the county court.